I can only imagine that you are correct, since on the main crate engine page, they have this warning: "Unless specified by GM, these engines should only be used in 1973 and earlier pre-emissions vehicles."

Keep digging around on their site. I think they used to offer a 350 HO with all the goodies required to bolt a TBI on top of it. Maybe it was in their engine shop section... You'll still need a bigger throttle body and a custom chip however. Your stock TBI stuff just wasn't designed for a 330 HP engine. They can probably set you up with those parts as well.

Yup. The cam in the 330 hp HO 350 Has too much duration for the stock chip in the computer to handle.
You could use that engine but you would need to get a new chip burned for that cam. A bigger TB would also be a good idea. The stock 1 11/16" bore TB is only good for around 300 hp.
The 2" bore TB from a 454 will work great.

You could also put a bigger TB on the sdpc2000 TBI performance engine to make more power. SD rates those engines with the stock TB. Flow more to them and they should make over 300 hp. 2 bolt main blocks aren't all that bad. They will handle 300-350+ Hp No problem. I have built some nice 2 bolt main engines that lasted a long time.

I have a 454 TB that I'm going to clean up a little and smooth out. I also plan on getting the vortec style intake and porting it a little to match the TB.

I really don't see the point in paying a grand more for the "TBI" motor if a slightly smaller cam is all I need.

Anyone with a ZZ4 or other GM performance motor and a TBI??? /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/ears.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/1zhelp.gif

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